In: Physics

Imagine you fill an insulated cup almost full with chopped or crushed ice, and measure the temperature after a minute or two, once it’s all come to thermal equilibrium. Since this ice is frozen water, the temperature should be at 0°C or not more than a couple of degrees below. Then, imagine you add a bunch of salt and stir it around.

What do you think the lowest temperature you can attain will be? Why? What happens to the amount of liquid present if you keep stirring and adding salt? How can we understand this phenomenon in terms of thermal and bond energy systems?

Develop an explanation for the changes you would observe in this physical system (decrease in temperature and change of phase) in terms of the Energy-Interaction Model. Preview the document

28
g of ice at -100C is dropped in an insulated 75-g aluminum
calorimeter cup containing 140 g of water at 300C. (a) Calculate
the equilibrium temperature of the container. Specific heats of
liquid water, ice and aluminum are 4186 J/(kg 0C), 2090 J/(kg 0C)
and 910 J/(kg 0C)respectively. Latent heat of fusion for ice is
3.33 x 105 J/kg. (b) What if, find the final temperature if 68 g of
ice had been dropped.

28 g of ice at -10⁰C is dropped in an insulated 75-g aluminum
calorimeter cup containing 140 g of water at 30⁰C. (a) Calculate
the equilibrium temperature of the container. Specific heats of
liquid water, ice and aluminum are 4186 J/(kg ⁰C), 2090 J/(kg ⁰C)
and 910 J/(kg ⁰C)respectively. Latent heat of fusion for ice is
3.33 x 105 J/kg. (b) What if, find the final temperature if 68 g of
ice had been dropped.

if you transfer heat energy to a perfectly insulated cup of some
liquid (no heat energy can be transferred in or out through the
walls) what determines how much the temperature changes? Does it
depend on how much heat energy you transfer, how much liquid there
is in the cup, what the liquid is, or what the initial temerpature
of the liquid is? Which of these factors do you think make a
differnce in how much the temperture rises?

1. An insulated container contains 1.20kg of water
with 0.73kg of ice floating in it. You place a block of
iron with mass of 4.60kg in this ice bath. The iron is
initially at a temperature of 400 ºC. What is the
composition and temperature of
the final mixture?
For ice Lf=33.5x104J/kg.
For water c=4186J/(kg•K).
For iron c=448 J/(kg•K).
2. A heat transfer of 9.5 x 105 J is needed to
convert a block of ice at -15°C to water at 15°C. What
was the...

You work for SneauxCeauxne, the
Cajun-inspired crushed-ice dessert company. You’ve collected data
on monthly sales (S, number of snow-cones per month) and the price
of your regular-size snow-cone (P, in dollars), as well as the
daily average summer temperature in your most popular market (T, in
degrees Fahrenheit). You estimate the following regression model: S
= a + bP + cT. In your regressions, you usually look for a
10%-or-better level of confidence.
a. What signs do you
expect for...

Imagine that you have decided to open a small ice cream stand on
campus called "Ice-Campusades." You are very excited because you
love ice cream (delicious!) and this is a fun way for you to apply
your business and economics skills! Here is the first month's
scenario--you order the same number (and the same variety) of ice
creams each day from the ice cream suppliers, and your ice creams
are always marked at $1.50 each. However, you notice that there...

To make homemade ice cream. You fill a pot with 1.50kg
of water, and dissolve 175g of CaCl2(MW=110.98g/mol) into it.
A. Freezing point depression constant of water is
1.68degC./m. What will be the freezing point of the salt/water
mixture be?
B.From the ice cream, you have kidney trouble and
decide to use the CaCl2/water mixture from part A in a dialysis
machine. If the density of the solution is 1.05g/ml and temp is
25.0degC. What will be the osmotic pressure?...

Imagine that the psychology department wants to consult you on
a project designed to measure how students’ expectations for the
difficulty of Intro to Psychology class actually influences their
final grade. The department randomly selects 50 Intro students at
the beginning of the semester and asks them, “What grade do you
expect to get in Intro to Psychology this semester?” Below are the
numbers students reported for their expected grade.
Note: A = 4.0, B = 3.0, C = 2.0,...

would like you to imagine that you have a black bag full of 20
marbles. All the marbles contained in the bag are the same size,
and texture. The marbles in the bag are 5 red, 5 blue, 5 yellow and
5 green.
What is the probability of pulling out 2 blue marbles from the
bag assuming the first one is not replaced?
What is the probability of pulling out 2 blue marbles from the
bag assuming that the first...

Imagine you plate .1ml of full strength milk on an NA plate and
250 colonies grew, how many CFU/ml are in the milk?
PLEASE TYPE YOUR ANSWER
Imagine you plate .1ml of full strength milk on an NA
plate and 250 colonies grew, how many CFU/ml are in the
milk?
NOW .2ml of a 1:100 dilution of milk on
a EMB plate and 215 colonies
grew. How many CFU/ml are in the original (full
concentration) milk?
LASTLY, Imagine you plate...

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